Inhomogeneously doped two-leg ladder systems
arXiv:cond-mat/0206344 · doi:10.1103/PhysRevB.67.184517
Abstract
A chemical potential difference between the legs of a two-leg ladder is found to be harmful for Cooper pairing. The instability of superconductivity in such systems is analyzed by compairing results of various analytical and numerical methods. Within a strong coupling approach for the t-J model, supplemented by exact numerical diagonalization, hole binding is found unstable beyond a finite, critical chemical potential difference. The spinon-holon mean field theory for the t-J model shows a clear reduction of the the BCS gaps upon increasing the chemical potential difference leading to a breakdown of superconductivity. Based on a renormalization group approach and Abelian bosonization, the doping dependent phase diagram for the weakly interacting Hubbard model with different chemical potentials was determined.
Revtex4, 11 pages, 7 figures
References in corpus (13)
- The pseudogap in high-temperature superconductors: an experimental survey
- Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
- Experiments on Ladders Reveal a Complex Interplay between a Spin-Gapped Normal State and Superconductivity
- Experimental realization of a 2D fractional quantum spin liquid
- Weak Coupling Phase Diagram of the Two Chain Hubbard Model
- Superconductivity in a Quasi One Dimensional Spin Liquid
- Exact SO(8) Symmetry in the Weakly-Interacting Two-Leg Ladder
- Properties of lightly doped t-J two-leg ladders
- The N-chain Hubbard Model in Weak Coupling
- Evidence for a superfluid density in t--J ladders
- Successive opening of the Fermi surface in doped N-leg Hubbard ladders
- Lightly Doped t-J Three-Leg Ladders - an Analog for the Underdoped Cuprates
- Andreev scattering in the asymmetric ladder with preformed bosonic pairs
Cited by in corpus (5)
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- Orbital current patterns in doped two-leg Cu-O Hubbard ladders
- New results for the t-J model in ladders: Changes in the spin liquid state with applied magnetic field. Implications for the cuprates
- Influence of non-magnetic impurities on hole doped two-leg Cu-O Hubbard ladders
- Competing phases and critical behavior in three coupled spinless Luttinger liquids